Comparison

VisualDx vs WikEM

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

VisualDx

This visual reference tool aids medical professionals in improving patient engagement and diagnostic accuracy. It utilizes AI and a vast image atlas to help build custom differentials, share patient-specific images, and access comprehensive diagnostic information. Earn continuing education credits while making better medical decisions.

Highlights
  • Build custom differentials
  • Engage patients with visual aids
  • Improve diagnostic accuracy
  • Access therapy and test options
  • Recognize infectious diseases
  • Earn CME credits
Currently charting
Read full description

VisualDx is a visual reference tool for medical professionals that leverages AI technology and a comprehensive image atlas to support faster, more confident decisions, fewer unnecessary referrals and testing, and higher patient engagement and satisfaction. With VisualDx, clinicians can: • Build dynamic differentials that evolve as you think. • Use guided support to surface clinically relevant results. • Compare diagnoses to improve decisions for your patients. • Use our AI to take a picture of your patient’s skin condition to better understand morphology and possibilities. • Engage with patients by sharing pictures of skin that reflect their disease presentation. • Access therapy and testing recommendations across over 3,500 conditions. • Quickly recognize infectious diseases and travel-related illnesses with our public health resources. • Test your diagnostic skills with our image challenges and educational resources. • Earn 0.5 AMA PRA Category 1 Credits™ for internet point of care activity with every search. See why this award-winning clinical decision support system is being used in more than 2,300 hospitals, clinics, and medical schools by physicians, nurses, students, PAs, NPs, and other healthcare professionals worldwide. VisualDx requires a subscription. Terms of Use: https://www.visualdx.com/legal/acceptable-use-policy-notice Privacy Policy: https://www.visualdx.com/legal/privacy-policy/

About

WikEM

This app provides a continuously updated wiki and database of emergency medicine knowledge for physicians. Access key information offline for rapid reference during daily practice. An in-app subscription unlocks advanced AI-powered questions, favorites, and history features.

Highlights
  • Emergency medicine knowledge database
  • Continuously updated content
  • Offline access
  • AI-powered questions (subscription)
  • Favorites and history (subscription)
Features
Read full description

WikEM is an online wiki and database of emergency medicine knowledge to assist physicians with their daily practice. The content is continuously updated from WikEM.org allowing for rapid reference of key information. The content is available offline with this mobile application. WikEM is intended for clinicians only and not directly for patients. In app subscription purchases: *The in-app purchase unlocks unlimited natural language questions using our AI and also favorites and history features • Payment will be charged to iTunes Account at confirmation of purchase • Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period • Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal • Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase • Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable WikEM terms of use: wikem.org/wiki/WikEM:Terms_of_Use

Screenshots

VisualDx4 screens
WikEM4 screens

Verdict

The call

The clearest difference is monetization model: WikEM at free with in-app purchases against VisualDx's subscription. WikEM also leads on rating (4.8 vs 4.4) and ratings volume (4.7K vs 186). VisualDx's advantage is review sentiment (84% vs 54%) and chart position (#15 vs unranked). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. VisualDx sells 11 in-app purchases, starting at $39.99 per month and WikEM sells 10 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

WikEM holds the better App Store score, 4.8 against 4.4. That said, the two scores are not equally well evidenced: WikEM has 4.7K ratings behind it against 186, so its average is the more settled of the two. Written reviews complicate that: 84% of VisualDx's written reviews are positive against 54% of WikEM's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

VisualDx ships an update fortnightly, WikEM every 5 days. Both last shipped on September 23, 2026.

Scorecard6 real differences · 5 level
VisualDx versus WikEM: the parameters behind the verdict, then further details
ParameterVisualDxWikEM
PriceFreeFree
Rating4.4 (186 ratings)4.8 (4.7K ratings) — better
Positive reviews84.3% of reviews — better54.1% of reviews
Number of ratings1864.7K — better
Update frequencyFortnightlyEvery 5 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationSubscriptionFree with in-app purchases — better
Best chart rank#15 — better—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.415.1 — better
Further details — not scored
Size226 MB157 MB
Age rating17+17+
DeveloperLogical ImagesOpenEM Foundation

Customer experience

VisualDx

All ratings186 ratings
Positive83.3%
Neutral4.8%
Negative11.8%
Written reviews102 reviews
Positive84.3%
Neutral1.0%
Negative14.7%

WikEM

All ratings4,693 ratings
Positive96.1%
Neutral1.3%
Negative2.5%
Written reviews133 reviews
Positive54.1%
Neutral7.5%
Negative38.3%

User reviews

VisualDx

From 186 App Store ratings

What we love

  • 📸 Excellent clinical images and kodachromes
  • 👍 User-friendly interface and easy navigation
  • 🎓 Comprehensive differential diagnosis tool
  • 📚 Detailed disease summaries and treatment information
  • 🌍 Inclusive representation of skin of color

Room to improve

  • 💰 Expensive subscription cost
  • ❌ Difficult subscription cancellation process
  • 🐛 App crashes and performance issues
  • 📱 Quiz feature laggy and unreliable
  • 😤 Poor customer service responsiveness

WikEM

From 4.7K App Store ratings

What we love

  • 💡 Useful and concise information
  • 🚀 Great resource for quick reference
  • 👍 Helpful for medical professionals

Room to improve

  • 🐛 Frequent login and account issues
  • 🐛 App crashes and database loading problems
  • 🐛 Compatibility issues with newer devices
  • 🔋 High battery consumption

Bugs and requests

VisualDx

Reported bugs

6 issues
  • App crashes when using quiz feature
  • CME credit claiming functionality fails
  • Subscription cancellation not processed
  • Renewal charges despite cancellation requests
  • Quiz unable to load properly
Show 1 more
  • Account access issues after payment

Requested features

6 requests
  • Make app free again (previously free)
  • Simplify subscription cancellation in-app
  • Improve quiz functionality for mobile
  • Add quiz feature to desktop version
  • Expand patient information handouts
Show 1 more
  • Better quiz image clarity and context

WikEM

Reported bugs

4 issues
  • Login screen freezes
  • Incompatible with older devices
  • Broken hyperlinks and charts
  • Search function not working as expected

Requested features

4 requests
  • Dark mode support
  • Ability to save favorites and customize the app
  • Improved search functionality
  • Regular content updates

In-app purchases

11 purchases

VisualDx

Subscriptions9
  • Complete (1 Month)1 Month trial$39.991 Month
  • VisualDx Core Monthly7 Days trial$39.991 Month
  • Complete+DermExpert (1 Month)1 Month trial$49.991 Month
Show 6 more
  • VisualDx Elite Monthly7 Days trial$49.991 Month
  • Add DermExpert (1 Year)$99.991 Year
  • Complete (1 Year)1 Month trial$149.991 Year
  • VisualDx Core Annual7 Days trial$249.991 Year
  • VisualDx Elite Annual7 Days trial$299.991 Year
  • Complete+DermExpert (1 Year)1 Month trial$499.991 Year
One-time2
  • Add DermExpert (1 yr)$99.99
  • Complete (1 yr)$399.99
10 purchases

WikEM

Subscriptions2
  • WikEM AI Search$1.991 Month
  • Premium Features$4.991 Year
One-time8
  • Personal Notes$0.99
  • Favorites and Lists$5.99
  • History and Favorites$9.99
Show 5 more
  • WikEM Russian Content$29.99
  • WikEM Italian Content$29.99
  • WikEM Polish Content$29.99
  • WikEM Hindi Content$29.99
  • WikEM Turkish Content$29.99

Questions

Is VisualDx free?
VisualDx is free to download, with in-app purchases available.
Is WikEM free?
WikEM is free to download, with in-app purchases available.
Which has better reviews, VisualDx or WikEM?
WikEM is rated higher. VisualDx averages 4.4 out of 5 from 186 ratings, while WikEM averages 4.8 from 4.7K ratings.
Do VisualDx or WikEM have ads?
Neither VisualDx nor WikEM shows ads.
Which is updated more often, VisualDx or WikEM?
VisualDx ships an update fortnightly, and WikEM every 5 days. Most recently, VisualDx was updated on September 23, 2026 and WikEM on September 23, 2026.

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